*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-dark: #4f46e5;--bg-main: #0f172a;--bg-sidebar: #1e293b;--bg-message-user: #3b82f6;--bg-message-ai: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--border: #334155;--shadow: rgba(0, 0, 0, .3)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg-main);color:var(--text-primary);height:100vh;overflow:hidden}.chat-container{display:flex;height:100vh}.sidebar{width:320px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.sidebar-header{padding:1.5rem;border-bottom:1px solid var(--border)}.sidebar-header h2{font-size:1.25rem;font-weight:600}.settings{padding:1.5rem;flex:1}.setting-group{margin-bottom:1.5rem}.setting-group label{display:block;margin-bottom:.5rem;font-size:.875rem;font-weight:500;color:var(--text-secondary)}.setting-group select,.setting-group input[type=range]{width:100%;padding:.5rem;background:var(--bg-main);border:1px solid var(--border);border-radius:.5rem;color:var(--text-primary);font-size:.875rem}.setting-group select:focus,.setting-group input:focus{outline:none;border-color:var(--primary)}.setting-group small{display:block;margin-top:.25rem;font-size:.75rem;color:var(--text-secondary)}.setting-group input[type=checkbox]{width:auto;margin-right:.5rem}.clear-btn{width:100%;padding:.75rem;background:#ef4444;color:#fff;border:none;border-radius:.5rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:background .2s}.clear-btn:hover{background:#dc2626}.stats{padding:1.5rem;border-top:1px solid var(--border);background:#0003}.stats h3{font-size:.875rem;margin-bottom:1rem;color:var(--text-secondary)}.stat-item{display:flex;justify-content:space-between;margin-bottom:.5rem;font-size:.875rem}.stat-item span:first-child{color:var(--text-secondary)}.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.chat-header{padding:1.5rem;border-bottom:1px solid var(--border);background:var(--bg-sidebar);display:flex;justify-content:space-between;align-items:center}.chat-header h1{font-size:1.5rem;font-weight:600}.current-model{font-size:.875rem;color:var(--text-secondary)}.current-model span{color:var(--primary);font-weight:600}.messages{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:1rem}.welcome-message{text-align:center;padding:3rem 2rem;max-width:600px;margin:auto}.welcome-message h2{font-size:2rem;margin-bottom:.5rem}.welcome-message p{color:var(--text-secondary);margin-bottom:2rem}.quick-prompts{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}.prompt-btn{padding:.75rem 1rem;background:var(--bg-sidebar);border:1px solid var(--border);border-radius:.5rem;color:var(--text-primary);cursor:pointer;transition:all .2s;font-size:.875rem}.prompt-btn:hover{background:var(--primary);border-color:var(--primary);transform:translateY(-2px)}.message{display:flex;gap:1rem;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{flex-direction:row-reverse}.message-avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}.message.user .message-avatar{background:var(--bg-message-user)}.message.assistant .message-avatar{background:var(--bg-message-ai)}.message-content{flex:1;max-width:70%}.message-bubble{padding:1rem 1.25rem;border-radius:1rem;line-height:1.6;white-space:pre-wrap;word-wrap:break-word}.message.user .message-bubble{background:var(--bg-message-user);border-bottom-right-radius:.25rem}.message.assistant .message-bubble{background:var(--bg-message-ai);border-bottom-left-radius:.25rem}.message-time{font-size:.75rem;color:var(--text-secondary);margin-top:.5rem;padding:0 .25rem}.typing-indicator{display:flex;gap:.25rem;padding:1rem 1.25rem}.typing-dot{width:8px;height:8px;border-radius:50%;background:var(--text-secondary);animation:typing 1.4s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:scale(.8)}30%{opacity:1;transform:scale(1)}}.input-area{padding:1.5rem;border-top:1px solid var(--border);background:var(--bg-sidebar);display:flex;gap:1rem}#user-input{flex:1;padding:.75rem 1rem;background:var(--bg-main);border:1px solid var(--border);border-radius:.75rem;color:var(--text-primary);font-size:.95rem;font-family:inherit;resize:none;transition:border-color .2s}#user-input:focus{outline:none;border-color:var(--primary)}.send-btn{padding:.75rem 1.5rem;background:var(--primary);color:#fff;border:none;border-radius:.75rem;cursor:pointer;font-weight:600;display:flex;align-items:center;gap:.5rem;transition:all .2s}.send-btn:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-2px)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.message-bubble pre{background:#0000004d;padding:1rem;border-radius:.5rem;overflow-x:auto;margin:.5rem 0}.message-bubble code{font-family:Monaco,Menlo,Consolas,monospace;font-size:.875rem}@media(max-width:768px){.sidebar{position:absolute;left:-320px;z-index:10;transition:left .3s;height:100vh}.sidebar.open{left:0}.quick-prompts{grid-template-columns:1fr}.message-content{max-width:85%}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-main)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}